NDLI: Aqueous solubilization of hydrophobic supramolecular metal

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Chemical Science Vol - 5 Issue - 5

Chemical Science Vol - 5 Issue - 4

Chemical Science Vol - 5 Issue - 3

Chemical Science Vol - 5 Issue - 2

Chemical Science Vol -4

Chemical Science Vol -3

Chemical Science Vol -2

Chemical Science Vol -1

Aqueous solubilization of hydrophobic supramolecular metal–organic nanocapsules

Content Provider	Royal Society of Chemistry (RSC)
Author	Kumari, H. Kline, S. R. Atwood, J. L.
Copyright Year	2014
Abstract	Micelles of metal-seamed C-propylpyrogallol[4]arene-based [(PgC3)nM4nL0–4n, L = ligand, M = metal] hexamers and dimers in water have been formulated using non-ionic surfactants and characterized using in situ scattering techniques. Polysorbitans (tween 20, tween 40, tween 80) are utilized to solubilize (PgC3)6Cu24 and (PgC3)6Ni24L24 hexamers, (PgC3)2Ni8L8, (PgC3)2Zn8L8, and (PgC3)2Co8L8 dimers in water. The dimensions of micelles of tweens⊂(PgC3)nM4nL0–4n dimers and hexamers are studied using dynamic light scattering (DLS; hydrodynamic radius/Rh) and small-angle neutron scattering (SANS). SANS data is fitted to a polydisperse core–shell–sphere model (static radius/RHS) and used to calculate the radius of gyration (Rg). An increase in radius of the tween 20 (C12)- and tween 40 (C16)-based micelles is observed with an increase in the radius of the nanocapsule (dimer vs. hexamer); however, given the longer alkyl tails of tween 80 (C18:1, cis-9), a progression in radius is not observed for tween 80-enclosed micelles due to the unsaturation (C9) and bent alkyl tail of the surfactant. The Rg : Rh ratios are close to 0.77 for the control (0.62), tween 20⊂dimeric (0.67) and tween 20⊂hexameric (0.68) micelles that demonstrates the sphericity of micelles in water. In contrast, the higher Rg/Rh ratio (0.76 to 0.93) of tween 80-based micelles is indicative of more elongated micellar species in aqueous solution.
Starting Page	2554
Ending Page	2559
Page Count	6
File Format	HTM / HTML PDF
ISSN	20416520
Volume Number	5
Issue Number	6
Journal	Chemical Science
DOI	10.1039/c4sc00035h
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Dispersity Hydrodynamic radius Dynamic light scattering Ligand Neutron diffraction Alkyl Polysorbate 20 Micelle Polysorbate 80 Protein dimer Surfactant Polysorbate
Content Type	Text
Resource Type	Article
Subject	Chemistry

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